1927 in Ireland

Incumbents

• Governor-General: Tim Healy
• President of the Executive Council: W. T. Cosgrave

  Events

• 6 April – Dan Breen proposes a Bill in the Dáil that Article 17 of the Irish Free State Constitution be removed. President W. T. Cosgrave opposes the removal of the Oath of Allegiance to the British Crown.
• 13 April – delegates at the annual conference of the Farmers' Party reject proposals to merge with Cumann na nGaedheal.
• 18 April – Celtic Park in Belfast is opened. It is the first greyhound track in Ireland.
• 4 June – the results of the General Election are a hung Dáil, with Fianna Fáil entering the Dáil for the first time and removing Cumann na nGaedheal's majority.
• 20 June – in a radio broadcast, the leader of Fianna Fáil, Éamon de Valera, says that the results of the general election prove that the people of Ireland want to get rid of the Oath of Allegiance.
• 29 June – a morning Solar eclipse takes place across Ireland.
• 10 July – Kevin O'Higgins, Vice-President of the Executive Council and Minister for Justice, is assassinated by the anti-Treaty Irish Republican Army in Dublin.
• 15 July – Constance Markievicz dies aged 59. She was an officer in the Irish Citizen Army, taking part in the Easter Rising; the first woman elected to the British House of Commons, though she did not take her seat; and the first female Irish cabinet minister.
• 28 July – Ireland's first automatic telephone exchange is opened in Dublin.
• 11 August – following changes to the electoral laws Fianna Fáil Teachtaí Dála arrive at Leinster House for the first time. They take the Oath of Allegiance, dismissing it as an "empty formula".
• 15 September – a new general election is called due to the hung Dáil. Again it was very close, with Cumann na nGaedheal winning 62 seats, Fianna Fáil 57, Labour 13, the Farmers' Party 6, National League Party 2, and the Irish Worker League just one – James Larkin.
• 27 October - a strong gales kills 45 fishermen off the coast of County Galway
• November – Ernest Bewley opens his Grafton Street café in Dublin.
• The Electricity Supply Board is established as an offshoot of the Shannon Scheme.
• The Agricultural Credit Corporation is set up to encourage investment in agriculture.
• Mary Bailey becomes the first woman to pilot an aeroplane across the Irish Sea.
• The Industrial and Commercial Property Registration Office is established at 45 Merrion Square, Dublin.

  Arts and literature

• James Joyce's Pomes Penyeach is published in Paris.
• W.B. Yeats' October Blast and Stories of Red Hanrahan and the Secret Rose are published in the UK.

  Sport

Football

• ;International Games:
• :23 April: Ireland 1–2 Italy 'B'
• ;League of Ireland
• :Winners: Shamrock Rovers
• ;FAI Cup
• :Winners: Drumcondra 1–1, 1–0 Brideville

  Gaelic Games

• The All-Ireland Champions are Dublin and Kildare.

  Golf

• Irish Open is won by George Duncan.

  Greyhound Racing

• 18 April: the first greyhound racing track in Ireland opens at Celtic Park.

  Births

• 8 January – Tim Flood, hurler
• 15 January – Michael Barrett, Fianna Fáil TD.
• 20 January – John O'Connell, Labour Party TD, Cabinet Minister, Ceann Comhairle of Dáil Éireann and MEP.
• 3 February – Val Doonican, popular singer.
• 5 February – John S. Beckett, musician, composer and conductor.
• 16 February – Pearse Hutchinson, poet, broadcaster and translator.
• 3 March – Aidan Higgins, writer.
• 20 March – Cairbre, lion mascot.
• 24 April – Eamon Casey, Bishop of Galway, 1976–1992.
• 8 July
• *Maurice Hayes, public servant, independent member of Seanad Éireann.
• *John McAndrew, Mayo Gaelic footballer, doctor and greyhound trainer.
• 26 July – Danny La Rue, born Daniel Patrick Carroll, female impersonator.
• 6 August – Richard Murphy, poet.
• 15 August – Patrick Galvin, poet and dramatist.
• 25 September – Gordon Wilson, peace campaigner.
• 9 October – Frank O'Farrell, soccer player and manager.
• 14 October – Alf Ringstead, soccer player.
• 4 December – Pat Daly, soccer player.
• 17 December – Patricia Driscoll, actress.
• Imogen Stuart, sculptor.

  Deaths

• 6 February – Sam Maguire, Irish Republican and Gaelic footballer.
• 25 February – David Baird, United States Senator from New Jersey from 1918 to 1919.
• 9 March – Martin Fitzgerald, elected to Seanad in 1922 and 1925.
• 22 April – Robert John McConnell, businessman, baronet and Lord Mayor of Belfast.
• 3 May – Tom Gallaher, tobacco manufacturer.
• 1 June – J. B. Bury, historian, classical scholar and philologist.
• 10 July – Kevin O'Higgins, Minister for Justice, assassinated by the Irish Republican Army.
• 15 July – Constance Markievicz, Sinn Féin and Fianna Fáil TD, member of 1st Dáil, Cabinet Minister.
• 22 July – Martin Morris, 2nd Baron Killanin, barrister and politician.
• 4 August – John Dillon, land reform agitator, Irish Home Rule activist, nationalist politician, MP and last leader of the Irish Parliamentary Party .
• 5 August
• * Joseph O'Mara, opera singer.
• * Henry Prittie, 4th Baron Dunalley, peer and Lord Lieutenant of County Tipperary 1905–1922.
• 3 October – Gerald Carew, 5th Baron Carew.
• 7 October – Edward Guinness, 1st Earl of Iveagh, philanthropist and businessman.
• 16 October – Sir Henry Robinson, 1st Baronet, civil servant.
• 22 November – Patrick O'Donnell, Cardinal, Archbishop of Armagh and Primate of All Ireland.
• 31 December – Dermot Bourke, 7th Earl of Mayo, served in Seanad from 1922 to 1927.